EP2163372A1 - Verfahren zum formen eines flaschenkörpers aus kunstharz - Google Patents

Verfahren zum formen eines flaschenkörpers aus kunstharz Download PDF

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Publication number
EP2163372A1
EP2163372A1 EP08764933A EP08764933A EP2163372A1 EP 2163372 A1 EP2163372 A1 EP 2163372A1 EP 08764933 A EP08764933 A EP 08764933A EP 08764933 A EP08764933 A EP 08764933A EP 2163372 A1 EP2163372 A1 EP 2163372A1
Authority
EP
European Patent Office
Prior art keywords
bottle
preform
opening portion
mouth opening
synthetic resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08764933A
Other languages
English (en)
French (fr)
Other versions
EP2163372B1 (de
EP2163372A4 (de
Inventor
Yusuke Ishii
Takashi Otsuka
Katsuyoshi Inagawa
Takao Iizuka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yoshino Kogyosho Co Ltd
Original Assignee
Yoshino Kogyosho Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yoshino Kogyosho Co Ltd filed Critical Yoshino Kogyosho Co Ltd
Priority to EP15156681.7A priority Critical patent/EP2907648B1/de
Publication of EP2163372A1 publication Critical patent/EP2163372A1/de
Publication of EP2163372A4 publication Critical patent/EP2163372A4/de
Application granted granted Critical
Publication of EP2163372B1 publication Critical patent/EP2163372B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/14—Making preforms characterised by structure or composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/06—Making preforms by moulding the material
    • B29B11/08—Injection moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C2049/023—Combined blow-moulding and manufacture of the preform or the parison using inherent heat of the preform, i.e. 1 step blow moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
    • B29C2949/0772—Closure retaining means
    • B29C2949/0773—Threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/078—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/081—Specified dimensions, e.g. values or ranges
    • B29C2949/082—Diameter
    • B29C2949/0822—Diameter of the neck
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/081—Specified dimensions, e.g. values or ranges
    • B29C2949/0829—Height, length
    • B29C2949/0835—Height, length of the body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/081—Specified dimensions, e.g. values or ranges
    • B29C2949/0829—Height, length
    • B29C2949/0836—Height, length of the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/22—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at neck portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/24—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at flange portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/26—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at body portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/28—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at bottom portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3024—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3032—Preforms or parisons made of several components having components being injected
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
    • B29K2033/18—Polymers of nitriles
    • B29K2033/20—PAN, i.e. polyacrylonitrile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
    • B29K2105/258—Tubular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles

Definitions

  • This invention relates to a synthetic resin bottle and especially a biaxially drawn, blow molded bottle of a small-sized and narrow-mouthed type, which is used as a makeup container for mascara and eyeliner, and to a process for molding the same.
  • Patent Document 1 describes an invention concerning a biaxially drawn and blow molded bottle made of a polypropylene resin and a process for molding the same.
  • the preform body wall thickness has to be set in a limited range.
  • the expanded portion cannot have sufficient thickness.
  • the body wall would easily get dented, and the contents may instantly burst outside.
  • the bottle does not only give damage to its functions, but also it fails to feel well to the touch and fails to give the image of high quality, thus affecting merchantability of the product.
  • a technical problem to be solved by this invention is to create a biaxially drawing and blow molding process that can fully make up for a restricted upper limit to the preform body wall thickness.
  • An object of this invention is to provide a biaxially drawn, blow molded bottle which is narrow-mouthed and yet has a substantially expanded body.
  • the molding process is the first to be taken up.
  • the molding process of this invention to solve the technical problem comprises three steps of
  • the tall preform is thermally shrunk so that the portions other than the mouth opening portion of the preform would have a height smaller than that of the portions other than the mouth opening portion of the bottle.
  • Biaxial drawing and blow molding can be performed by setting the shrunk preform in a split mold used for that purpose. Since the initial preform has a greater height than the bottle, naturally the preform has a larger weight. Even in the case of a narrow-mouthed bottle having a relatively large expanded portion, the bottle would have a sufficient wall thickness.
  • Another molding process of this invention comprises that, in addition to the principal molding process described above, a bore diameter of 10 mm or less is set for the mouth opening portion of the preform and that a draw ratio of 2.0 times or more in the lateral direction is set for a maximum diameter portion of the bottle body.
  • the preform body diameter is roughly determined by the diameters of the mouth opening portion of the bottle product.
  • the minimum body wall thickness is determined by this preform body diameter and by the draw ratio in the lateral direction to be set for the maximum diameter portion of the bottle body.
  • the molding process of this invention ensures a large action-and-effect to be performed in the biaxial drawing and blow molding of a bottle that is narrow-mouthed and yet has a substantially expanded portion in a part or in an almost entire height range of the body.
  • Such a bottle is obtained under conditions that the mouth opening portion of the preform has a bore diameter of 10 mm or less and that the maximum diameter portion of the bottle body has a draw ratio of 2.0 times or more in the lateral direction.
  • Still another molding process of this invention comprises that the portions other than the mouth opening portion of the preform has a rate of thermal shrinkage in a range of 10 to 50%.
  • the preform has a rate of thermal shrinkage in the range of 10 to 50%. At a rate less than 10%, no effective weight increase can be expected. At a rate exceeding 50%, the preform could not help but shrink in a distorted shape because at such a rate, uniform drawing would become difficult in the biaxial drawing and blow molding operation.
  • Still another molding process of this invention comprises that thermal shrinkage of the preform and preliminary heating for biaxially drawing and blow molding the preform are conducted simultaneously.
  • the molding steps can be simplified by simultaneously conducting the thermal shrinkage of the preform and the preliminary heating for the biaxial drawing and blow molding step. Naturally it is preferred to conduct these two steps separately if there is a large difference between the temperature best suited to the thermal shrinkage and the temperature suited to the biaxial drawing and blow molding step.
  • Still another molding step of this invention comprises that the synthetic resin used in this invention is selected from a group comprising the resins of polypropylene series, polyethylene naphthalate series, and polyacrylonitrile series.
  • the rate of preform shrinkage in the height direction caused by heating is determined mainly by the type of synthetic resins and the heating temperature.
  • the synthetic resins used in the biaxial drawing and blow molding the resins of the polypropylene (PP) series, the polyethylene naphthalate (PEN) series, and the polyacrylonitrile (PAN) series show relatively high rates of thermal shrinkage.
  • the second to be taken up is the synthetic resin bottle of this invention, which can be molded by the above molding process of this invention.
  • the synthetic resin bottle is a biaxially drawn, blow molded bottle having the mouth opening portion disposed on the body.
  • the bottle is mainly characterized in that the mouth opening portion has a bore diameter of 10 mm or less and that the maximum diameter of the body is 2.5 times or more, or even 3.0 times or more, as much as the bore diameter of the mouth opening portion.
  • the narrow-mouthed bottle having a mouth bore diameter of 10 mm or less has limitations in the attempt to thicken the body wall of the preform in the shape of a test tube, which is used as a precursor in the above-described biaxial drawing and blow molding.
  • the restricted upper limit to the preform body thickness can be supplemented to a satisfactory level by the above-described process for molding the synthetic resin bottle of this invention, i.e., by the process for thermally shrinking the preform having a greater height than that of the bottle product.
  • the body wall thickness can be kept at a satisfactory level even if the body is expanded to a maximum diameter 2.5 times or more as much as the bore diameter of the mouth opening portion, or even 3.0 times or more, depending on the bore diameter of the mouth opening portion and the type of the resin to be used.
  • a unique, synthetic resin bottle having a narrow mouth and yet having a substantially expanded body, made by the biaxially drawing and blow molding process.
  • Another construction of the synthetic resin bottle of this invention is that, in addition to other features, the maximum diameter portion of the body has a minimum thickness of 0.45 mm or more.
  • the body wall would not get dented easily by squeezing the areas nearby the expanded body portion with fingers.
  • Still another construction of the synthetic resin bottle of this invention comprises that the mouth opening portion is disposed on the body by way of a neck portion in a shape of a right circular cylinder and that the neck portion has a minimum outer diameter ranging from the outer diameter of the mouth opening portion to 2.0 times or less as much as the bore diameter of the mouth opening portion.
  • This neck portion connected to the mouth opening portion is formed by biaxially drawing and blow molding the preform body in the same way as the bottle body is formed.
  • the length and diameter of this neck portion, along with a cap fitted around this neck portion, give the bottle highly characteristic appearance.
  • the bottle can be provided with a funnel-shaped squeezer, which can be fitted by utilizing an overhang formed on an inner peripheral wall at a lower end of the mouth opening portion at the time when the neck portion is formed.
  • the minimum outer diameter of the neck portion is set at a level considerably smaller than the maximum diameter of the body, e.g., 2.0 times or less as much as the mouth bore diameter, then attention has to be paid to the drawing in the lateral direction in the biaxial drawing and blow molding at the upper end of the preform body to be molded into this neck portion and to the ways to circumvent troubles, such as dragging caused by the split blow mold. If these points are taken into consideration, limitations would become stronger in the ways to increase the outer diameter of the preform body. Therefore, in combination with the bore diameter of the mouth opening portion as small as about 10 mm or less, the upper limit to the preform body wall thickness would have to be restricted more and more.
  • this neck portion may also have the shapes of a right elliptical cylinder, a right oval cylinder, or a right square cylinder, in addition to the shape of a right circular cylinder. If the neck portion has a shape other than the right circular cylinder, the diameter would change in the peripheral direction. But since the minimum outer diameter limits any increase in the outer diameter of the preform body, the above construction specifies a constructive requirement that "the neck portion has a minimum outer diameter ranging from the outer diameter of the mouth opening portion to 2.0 times or less as much as the bore diameter of the mouth opening portion.”
  • Still another construction of the synthetic resin bottle of this invention comprises that a screw thread is notched on the outer peripheral surface of the mouth opening portion and that a cap in a roofed cylindrical shape is screwed on the mouth opening portion so as to cover the neck portion softly.
  • the container has a characteristic external appearance, which can be achieved by combining the shape of the neck portion, an expanded shape of the body, and the cap.
  • Still another construction of the synthetic resin bottle of this invention comprises that the bottle is utilized as a container for accommodating a makeup liquid such as mascara or eyeliner.
  • the bottle of this invention is narrow-mouthed and yet has a substantially expanded body.
  • the bottle may be provided with a slim neck portion.
  • the bottle can be utilized as a container for a makeup liquid, such as mascara or eyeliner.
  • a makeup liquid such as mascara or eyeliner.
  • the bottle can be differentiated from other make-up containers.
  • Still another construction of the synthetic resin bottle of this invention comprises that a resin of the polypropylene series (hereinafter referred to as a PP resin) is used as the synthetic resin material for the bottle.
  • a resin of the polypropylene series hereinafter referred to as a PP resin
  • the PP resins are crystalline materials. These resins have the drawing properties largely dependent on temperatures in the biaxial drawing and blow molding, and tend to have considerably uneven body wall thickness. Thus, it has so far been difficult to biaxially draw and blow mold the preforms into the narrow-mouthed bottles having a substantially expanded body.
  • the PP resins are the materials capable of having the rate of thermal shrinkage increased in the direction of preform height.
  • the molding process of this invention can make up for the restricted upper limit to the preform body thickness to a satisfactory level. In other words, the process of this invention enables the preform to have a sufficiently high average wall thickness so as to be able to supplement uneven wall thickness. Therefore, it has become possible to provide a new, narrow-mouthed PP resin bottle having a substantially expanded body.
  • Still another construction of the synthetic resin bottle of this invention comprises that synthetic resin to be used in this invention is selected from a group comprising a polyethylene naphthalate (PEN) resin and a polyacrylonitrile (PAN) resin.
  • synthetic resin to be used in this invention is selected from a group comprising a polyethylene naphthalate (PEN) resin and a polyacrylonitrile (PAN) resin.
  • the polyethylene naphthalate (PEN) resins and the polyacrylonitrile (PAN) resins are amorphous materials, but have relatively high glass transition temperatures. These resins, too, have the drawing properties largely dependent on temperatures in the biaxial drawing and blow molding, and tend to have considerably uneven body wall thickness. And like the PP resins, the PEN and PAN resins are capable of having the rate of thermal shrinkage increased in the direction of preform height, thus making it possible to provide a narrow-mouthed bottle having a substantially expanded body.
  • the molding process and the synthetic resin bottle of this invention having the above construction has the effects described below.
  • the molding process of this invention ensures that the preform has a larger weight now that the initially formed preform has been taller than the bottle formed therefrom.
  • the process allows the bottle to have a sufficient body wall thickness, even though the bottle has a narrow mouth and a substantially expanded body.
  • the molding process of this invention ensures a large action-and-effect to be performed in the case of the preform having a bore diameter of 10 mm or less and the maximum diameter portion of the bottle body having a draw ratio of 2.0 times or more in the lateral direction.
  • the molding steps can be simplified by simultaneously conducting the thermal shrinkage of the preform and the preliminary heating for the biaxial drawing and blow molding step.
  • the synthetic resin to be used is selected from the group comprising a polypropylene resin, a polyethylene naphthalate resin, and a polyacrylonitrile resin, then a relatively high rate of thermal shrinkage is obtained, and as a result, an effective increase in preform weight can be easily achieved.
  • the construction of the synthetic resin bottle of this invention can be achieved by the molding process of this invention combined with the biaxial drawing and blow molding step.
  • the narrow-mouthed synthetic resin bottle made in the biaxially drawing and blow molding step has the following unique construction:
  • the above-described synthetic resin bottle of this invention has a narrow mouth and yet has a substantially expanded body.
  • the bottle can also be provided with a slim neck portion.
  • make-up liquids such as mascaras or eyeliners
  • the bottle should be differentiated from other products because of the new and unique shape.
  • Fig. 1 is an explanatory diagram showing an embodiment of the molding process of this invention combined with the biaxial drawing and blow molding step.
  • the injection molded preform 1 (partly shown in the vertical section) is superimposed with the bottle 11 (a front view drawn by a chain double-dashed line), while respective mouth opening portions 2 and 12 are positionally aligned.
  • Fig. 2 is a front view, with the right half in the vertical section, and Fig. 3 , a plan view, respectively showing the embodiment of a synthetic resin bottle molded by the molding process shown in Fig. 1 .
  • Fig. 4 is a front view, with the right half in the vertical section, showing an example of a makeup container for mascara, in which this bottle is utilized.
  • the preform 1 made of a polypropylene resin has the following dimensions:
  • the bottle 11 shown in Fig. 2 is obtained by biaxially drawing and blow molding the above preform 1.
  • the bottle 11 has a cylindrical neck portion 15, which has been blow molded to have a somewhat larger diameter than that of the mouth opening portion 12.
  • Under the neck portion, and by way of a flatly disposed ring portion 16, the bottle has a body 13 blow molded in a substantially expanded shape.
  • the bottle 11 has the following dimensions:
  • the bore diameter of the body 3 of the preform 1 is thus determined by the diameter of this core mold.
  • the outer diameter of the body 3 of the preform 1 is larger by only about 2 mm than the outer diameter D1b of the mouth opening portion 2 at the longest.
  • the mouth opening portion 2 has a bore diameter D1a of 10 mm or less, and the thickness of the body 3 of the preform 1 inevitably has an upper limit of about 3 mm.
  • the process for molding the preform 1 into the bottle 11 comprises the following steps of (1), (2), and (3):
  • the preform 1 has a height H2 of 46 mm after the thermal shrinkage step (1). This height is considerably smaller than the height H3 of the bottle 11, and thus, the preform 1 can be set smoothly in the split blow mold.
  • the vertical draw ratio in the biaxial drawing and blow molding, as calculated by H3/H2, is about 1.25 times.
  • the lateral draw ratio for the maximum diameter portion 13f of the body 13 of the bottle 11 is about 2.3 times. At this ratio, the minimum thickness of the peripheral wall in this portion is in a range of 0.55 to 0.61 mm. In this range, the wall would be sufficiently rigid with no dent in the wall of the body 3 in ordinary handling of bottles.
  • the weight limit is about 3.4 g, and the minimum thickness of the peripheral wall in the maximum diameter portion would be in a range of 0.4 to 0.45 mm.
  • the minimum wall thickness in the maximum diameter portion 13f of the body 13 of the bottle 11 can be increased by about 1.4 times.
  • Fig. 4 is a front view, with the right half in the vertical section, of an example of the make-up container for mascara, in which the bottle 11 of Fig. 2 is utilized as the container.
  • the container comprises the bottle 11 and the roofed cylindrical cap 21 which is screwed on the mouth opening portion 12 of the bottle 11.
  • the cap 21 is fitted around the neck portion 15, and softly covers the neck portion 15 to the lower end.
  • the application unit 22 comprising a shaft 22a and a brush 22b fitted at the front end of the shaft 22a.
  • a built-in cylinder 23 made of an elastomer resin is fitted firmly inside the mouth opening portion 12 in an area ranging from the upper end of the mouth opening portion 12 to the upper end of the neck portion 15.
  • This built-in cylinder 23 is provided with a funnel-shaped squeezer 23a which performs a function of squeezing an extra amount of the make-up liquid from the brush 22b.
  • an overhang 17 is formed on the inner peripheral surface of the bottle 11 on the border between the mouth opening portion 12 and the neck portion 15.
  • a locking mechanism is formed by using this overhang 17 to prevent the built-in cylinder 23 from slipping out of the mouth opening portion 12.
  • the molding process of this invention can fully make up for the restricted upper limit to the preform body wall thickness.
  • the bottle of this invention has a narrow mouth and yet has a substantially expanded body, and can be provided additionally with a slim neck portion. Because of its unique shape, the bottle is expected to have wide use in the field of narrow-mouthed bottles to be used as the containers for mascaras and eyeliners.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
EP08764933.1A 2007-05-31 2008-05-30 Verfahren zum formen eines flaschenkörpers aus kunstharz Active EP2163372B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15156681.7A EP2907648B1 (de) 2007-05-31 2008-05-30 Synthetische kunstharzflasche

Applications Claiming Priority (3)

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JP2007145918 2007-05-31
JP2007335963 2007-12-27
PCT/JP2008/060073 WO2008149819A1 (ja) 2007-05-31 2008-05-30 合成樹脂製壜体の成形方法

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP15156681.7A Division EP2907648B1 (de) 2007-05-31 2008-05-30 Synthetische kunstharzflasche
EP15156681.7A Division-Into EP2907648B1 (de) 2007-05-31 2008-05-30 Synthetische kunstharzflasche

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EP2163372A1 true EP2163372A1 (de) 2010-03-17
EP2163372A4 EP2163372A4 (de) 2014-09-03
EP2163372B1 EP2163372B1 (de) 2016-01-27

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EP08764933.1A Active EP2163372B1 (de) 2007-05-31 2008-05-30 Verfahren zum formen eines flaschenkörpers aus kunstharz

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US (2) US8440131B2 (de)
EP (2) EP2907648B1 (de)
JP (2) JP5013347B2 (de)
KR (2) KR101494908B1 (de)
CN (2) CN101541509B (de)
AU (1) AU2008258975B2 (de)
CA (2) CA2838364C (de)
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RU2697043C2 (ru) * 2014-08-01 2019-08-08 Дзе Кока-Кола Компани Небольшая упаковка для газированных напитков с улучшенными свойствами в отношении срока хранения

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KR101116169B1 (ko) * 2011-07-08 2012-03-06 피앤비팩(주) 유리용기 대체용 합성수지용기의 블로잉 성형장치 및 이를 이용한 블로잉 성형방법
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Publication number Priority date Publication date Assignee Title
CN104755250A (zh) * 2012-10-31 2015-07-01 株式会社吉野工业所 双轴拉伸吹塑成型容器
CN104755250B (zh) * 2012-10-31 2017-07-04 株式会社吉野工业所 双轴拉伸吹塑成型容器
RU2697043C2 (ru) * 2014-08-01 2019-08-08 Дзе Кока-Кола Компани Небольшая упаковка для газированных напитков с улучшенными свойствами в отношении срока хранения
US10399727B2 (en) 2014-08-01 2019-09-03 The Coca-Cola Company Lightweight base for carbonated beverage packaging
AU2015296030B2 (en) * 2014-08-01 2020-01-16 The Coca-Cola Company Small carbonated beverage packaging with enhanced shelf life properties
AU2015296030B9 (en) * 2014-08-01 2020-01-30 The Coca-Cola Company Small carbonated beverage packaging with enhanced shelf life properties
EP3174803B1 (de) * 2014-08-01 2020-12-16 The Coca-Cola Company Kleine kohlensäurehaltiges getränkepackung mit verbesserter haltbarkeit
US11077979B2 (en) 2014-08-01 2021-08-03 The Coca-Cola Company Small carbonated beverage packaging with enhanced shelf life properties
US11801964B2 (en) 2014-08-01 2023-10-31 The Coca-Cola Company Small carbonated beverage packaging with enhanced shelf life properties

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JP5013347B2 (ja) 2012-08-29
JP2012144300A (ja) 2012-08-02
KR20140130476A (ko) 2014-11-10
US20130228545A1 (en) 2013-09-05
US9669957B2 (en) 2017-06-06
CN101541509B (zh) 2013-11-27
US20100116777A1 (en) 2010-05-13
JP5453682B2 (ja) 2014-03-26
CN103496487A (zh) 2014-01-08
KR101494908B1 (ko) 2015-02-23
CA2688582A1 (en) 2008-12-11
EP2907648B1 (de) 2019-09-11
WO2008149819A1 (ja) 2008-12-11
CA2838364C (en) 2015-10-06
KR101476967B1 (ko) 2014-12-24
US8440131B2 (en) 2013-05-14
EP2163372B1 (de) 2016-01-27
CA2838364A1 (en) 2008-12-11
AU2008258975A1 (en) 2008-12-11
KR20100019406A (ko) 2010-02-18
EP2907648A1 (de) 2015-08-19
CN101541509A (zh) 2009-09-23
CA2688582C (en) 2015-03-31
AU2008258975B2 (en) 2012-07-05
EP2163372A4 (de) 2014-09-03
JPWO2008149819A1 (ja) 2010-08-26
CN103496487B (zh) 2016-05-04

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